公开(公告)号：US20240283689A1

公开(公告)日：2024-08-22

申请号：US18133081

申请日：2023-04-11

Applicant: Nokia Solutions and Networks Oy

Inventor： Di Che

IPC: H04L27/26 ,  H04L5/00

CPC classification number: H04L27/2627 ,  H04L5/006

Abstract: A method and apparatus for processing of signals in a point-to-multipoint (P2MP) network are provided. The processing includes obtaining link conditions, in a spectrum comprising multiple OFDM subcarriers, of a plurality of users at respective user nodes that are in communication with a central node of the network. The processing further includes inputting the link conditions to an entropy loading (EL) algorithm, thereby to determine a modulation format for each of the OFDM subcarriers; optimizing an allocation of OFDM subcarriers to users according to an OFDMA scheme; and for each user, loading data from a bitstream onto the allocated OFDM subcarriers in the respective determined modulation formats.

公开(公告)号：US11677476B2

公开(公告)日：2023-06-13

申请号：US17584864

申请日：2022-01-26

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Jinfeng Du ,  Qi Zhou ,  Di Che

IPC: H04B10/58 ,  H04B10/2575

CPC classification number: H04B10/58 ,  H04B10/2575

Abstract: A radio apparatus and system may include a means for modulating and/or demodulating an optical signal for respective transmission and/or reception of the optical signal using an optical channel connected to a remote radio unit. There may also be provided a means for performing, based on one or more pre-trained computational models, one or more operations on a digital signal corresponding to the optical signal for mitigating one or more non-linearities introduced by the optical modulating and/or demodulating means and the optical channel. The one or more pre-trained computational models may be pre-trained based on feedback data indicative of said one or more non-linearities.

公开(公告)号：US20250112706A1

公开(公告)日：2025-04-03

申请号：US18476982

申请日：2023-09-28

Applicant: Nokia Solutions and Networks Oy

Inventor： Di Che

IPC: H04B10/61

Abstract: An optical data receiver is configured for receiving optical signal comprising spectrally adjacent modulated subcarriers. The optical receiver includes an optical comb generator to output separate frequency tones, and a plurality of optical-to-electrical (OE) converters. The OE converters are configured to mix light of a plurality of the frequency tones with part of the received optical signal, and to output a temporal sequence of measurements of the mixture produced by said mixing. A digital signal processor is configured to recover a data stream carried by one of the subcarriers by performing multi-input multi-output (MIMO) processing using the temporal sequences of measurements output by at least two of the OE converters. The MIMO processing involves performing passband filtering for a passband wherein two of the subcarriers are down-converted by the mixing.